使用dmidecode命令時，如果不加任何參數，則打印出所有類型的信息；
查詢指令
查詢BIOS中的Secure boot設置：
[root@fp-web-112 ~]# bootctl status
查詢BIOS版本
[root@fp-web-112 ~]# dmidecode -s bios-version
6.00
查詢BIOS系統信息 
如果要查詢-t 后面的類型號，可以通過man dmidecode進行查詢
SMBIOS specification 2.7.1 中定義了如下的結構類型：
[root@fp-web-112 ~]# dmidecode -t 0# dmidecode 2.12-dmifsSMBIOS 2.4 present.
Handle 0x0000, DMI type 0, 24 bytesBIOS InformationVendor: Phoenix Technologies LTDVersion: 6.00Release Date: 09/21/2015Address: 0xE99E0Runtime Size: 91680 bytesROM Size: 64 kBCharacteristics:ISA is supportedPCI is supportedPC Card (PCMCIA) is supportedPNP is supportedAPM is supportedBIOS is upgradeableBIOS shadowing is allowedESCD support is availableBoot from CD is supportedSelectable boot is supportedEDD is supportedPrint screen service is supported (int 5h)8042 keyboard services are supported (int 9h)Serial services are supported (int 14h)Printer services are supported (int 17h)CGA/mono video services are supported (int 10h)ACPI is supportedSmart battery is supportedBIOS boot specification is supportedFunction key-initiated network boot is supportedTargeted content distribution is supportedBIOS Revision: 4.6Firmware Revision: 0.0